Jubilex appears as a massive pile of formless green ooze that is shot through with lines of jet black tar and sprouts countless blood red eyes that stare in every direction.[2] While his appearance is unique amongst oozes, it is less than distinctive and intimidating when compared to other demon lords.

Jubilex shows perhaps the least interest in Golarion of all demon lords in the Abyss. Dwelling in his Abyssal home of Undersump, he pays little attention to the workings of the rest of the multiverse. Some even believe that he may be unaware that he has followers at all, although this seems unlikely as he seems to enjoy absorbing and devouring the live sacrifices his followers offer him or any other part of the Material Plane he comes across. Many of his followers view Jubilex not as a deity to be revered, but as a potent, if dangerous, source of power that most (sane) people are too afraid to try and harvest. He is served by the omoxes[3] and his only fervent and organised followers can be found among the drow of House Tracinoa.[2]